Pen holding attachment for engraving machines



Jun 19, 1953 f A. J. MAS] 2,557,447

PEN HOLDING ATTACHMENT FOR ENGRAVING MACHINES Filed Nov. 22, 1948Inventor 35 Augustine J. Masi 26 2 42 B) w 8 7 WW 3M Fatentecl June 19,1951 UNITED STATES OFFICE PEN HOLDING ATTACHMENT FOR ENGRAVIN G MACHINESAugustine J. Masi, Philadelphia, Pa.

Application November 22, 1948, Serial No. 61,408

8 Claims. 1

This invention relates to a pen holding attachment for an engravingmachine and more particularly for a pantograph engraving machine of thetype embodying a vertically disposed chuck which moves horizontallyabove a work support in accordance with a predetermined patternsupported to one side of the work carried by the work support.

The primary object of this invention is to enable an engraving machineof the type above mentioned to be employed in lettering or the drawingof designs on work supported on the table or work support of themachine.

Another object is readily to convert an engraving machine into alettering or design reproducing machine without altering the mechanicalstructure of the machine itself.

The above and other objects may be attained by employing this inventionwhich embodies among its features a shank removably supported in thechuck of a conventional engraving machine for movement in unison withthe chuck above the work supported on the table or work support of theengraving machine, an arm carried by the shank and extending radiallytherefrom, a lever pivoted in the arm below the shank for movement in avertical are, said lever extending toward the axis of the shank and apen holder mounted on the end of the lever beneath the shank and havinga pen receiving socket therein which aligns axially with the shank.

Other features include a plunger mounted for vertical sliding movementin the arm and engaging the top of the lever on the side of its pivotremote from the pen holder to limit downward movement of the pen holder,a stem on the plunger extending upwardly through the arm, a thumb-pieceon the upper end of the stem in spaced relation to the arm and acompression coil spring surrounding the stem between the top of the armand the thumb-piece yieldingly to hold the plunger retracted.

Still other features include a tubular pen holder supported adjacent theend of the arm for longitudinal adjustment thereon so that the pensupported in the tubular pen holder may be axially aligned with the axisof the shank.

In the drawings:

Figure 1 is a side view of a conventional engraving machine showing thisattachment mounted in the chuck thereof for movement with said chuckabove the table or work support of the machine;

Figure 2 is a side view partially in section on a somewhat enlargedscale of this improved attachment;

Figure 3 is an end view of the attachment illustrated in Figure 2;

Figure 4 is an enlarged horizontal sectional view taken substantiallyalong the line 4-4 of Figure 2, and;

Figure 5 is a vertical sectional view taken substantially along the line5-5 of Figure 2.

Referring to the drawings in detail a conventional engraving machinedesignated generally I 0 is equipped with a conventional work support ortable l2 and chuck I4 which is mounted to move horizontally above thework support or table l2 in accordance with a pattern l6 supported onone side of the machine in a conventional manner. In employing myinvention, the spindle which normally rotates the chuck of the engravingmachine is used to support the pen during its movements horizontallyabove the table or work support l2.

My improved attachment designated generally I8 comprises a shank 20Which is clamped ina conventional manner in the chuck l4, and secured asby a screw 22 to the lower end of the shank 2D is an arm 24 whichextends radially from the shank and is equipped with a downwardlyextending leg 26, the lower end of which is bifurcated as at 28 for thereception of the penholding lever to be more fully hereinafterdescribed. Extending through the arm 24 in parallel relation to the axisof the shank 20 is a bore 29, the lower end of which opens into a recess30 which opens into the bottom of the bifurcated portion 28 as will bereadily understood upon reference to the drawings. The upper end of thebore 29 opens into a recess 32 which opens through the upper side of thearm 24 and mounted for vertical sliding movement in the bore 29 is astem 34. The lower end of the stem terminates'in a plunger 36 whichprojects into the bifurcation 28 and forms a stop which limits therocking movement of the lever to be more fully hereinafter described.Fixed to the upper end of the stem 34 in spaced relation to the top ofthe arm 24 is a thumb-piece 38, and surrounding the stem between thebottom of the recess 32 and the underside of the thumb-piece 38 is acompression coil spring 40 which serves to hold the stem and the plungerretracted into the recess 30 as will be readily understood uponreference to Figure 2.

Pivotally supported as at 42 in the bifurcation 28 at the lower end ofthe leg 26 of the arm 24 to rock in a vertical arc is a lever 44, thelonger end of which extend toward the axis of the shank 20, while itsshorter endprojects below the lower end of the plunger 36. The end ofthe lever 44 which lies adjacent the axis of the shank 20 is providedwith an arcuate recess 46 which lies substantially concentric withrelation to the axis of the shank 20, and entering the recessed end ofthe lever 44 is a bore 48 for the reception of the supporting bar of thepen holder to be more fully hereinafter described.

Opening laterally through the side of the arm 44 and communicating withthe bore 48 is an internally screw threaded bore 50 for the reception ofthe threaded shank of a thumb-screw 52, the inner end of which isadapted to enter the bore 48 as will be readily understood uponreference to Figure 4.

The pen holder which is used in conjunction with this device isdesignated generally 54 and comprises a tubular body 56 having an axialbore in which a pen B is sealed. Opening radially through the tubularbody 56 is an internally screw-threaded opening 60 for the reception ofthe threaded end of a supporting bar 52 which as illustrated in Figure 4is received in the bore 48. The inner end of the supporting bar 62frictionally engages the pen 58 in the pen holder 54. The underside ofthe lever 44 remote from the recess 46 is curved upwardly as at 64 inorder to prevent its contacting the work when pressure is applied to thethumb-piece 38.

In use the attachment is mounted in the engraving machine It) byentering the shank 28 into the chuck 14. In this position the axis ofthe pen 58 will align substantially with the axis of the shank 20.Should such alignment fail, it i obvious that by loosening thethumb-screw 52, the bar 62 may be adjusted within the bore 48, and uponagain tightening the thumb-screw 52, the pen holder 54 will be held inproper position beneath the lower end of the shank 2i) and in verticalalignment with the axis of the chuck l4. With the pen loaded with ink,it will be obvious that the point thereof will ride over the surface ofwork supported on the table or work support 12, and when it is desiredto shift the position of the device without contacting the work,pressure may be applied upon the thumbpiece 38 to rock the lever 44about its pivot 42 so as to lift the pen 58 clear of the work. Uponreleasin pressure on the thumb-piece 38 it is obvious that the pen willreturn by gravity into contact with the work, and by reason of itspivotal support the pen will be free to follow any slight irregularitiesin the surface of the work and will in effect float on the surfacethereof.

While in the foregoing there has been shown and described the preferredembodiment of this invention, it is to be understood that minor changesin the details of construction and arrangement of parts may be resortedto without departing from the spirit and scope of the invention asclaimed.

Having described the claimed as new is:

l. A pen holding attachment for a pantograph engraving machine having avertical chuck which moves horizontally above a work support, saidattachment comprising a shank removably supported in the chuck formovement therewith, an arm carried by and extending radially from saidshank, a lever pivoted in the arm below the shank for movement in avertical are, said lever extending toward the axis of the shank, a penholder mounted on the end of the lever beneath invention, what is theshank and having a pen receiving socket therein which aligns axiallywith the shank, and a plunger mounted for vertical sliding movement inthe arm and engaging the top of the lever on the side of its pivotremote from the pen holder to limit downward movement of the pen holder.

2. A pen holding attachment for a pantograph engraving machine havin avertical chuck which moves horizontally above a work support, saidattachment comprising a shank removably supported in the chuck formovement therewith, an arm carried by and extending radially from saidshank, a lever pivoted in the arm below the shank for movement in avertical arc, said lever extending toward the axis of the shank, a penholder mounted on the end of the lever beneath the shank and having apen receiving socket therein which aligns axially with the shank, aplunger mounted for vertical sliding movement in the arm and engagingthe top of the lever on the side of its pivot remote from the pen holderto limit downward movement of the pen holder, a stem on the plungerextending upwardly through the arm, a thumb-piece on the upper end ofthe stem in spaced relation to the arm and a compression springsurrounding the stem between the top of the arm and the thumbpieceyieldingly to hold the plunger retracted.

3. A pen holding attachment for a pantograph engraving machine having avertical chuck which moves horizontally above a work support, saidattachment comprising a shank removably supported in the chuck formovement therewith, an arm carried by and extending radially from saidshank, a lever pivoted in the arm below the shank for movement in avertical arc, said lever extending toward the axis of the shank, the endof the lever adjacent the axis of the shank having a concave recesstherein which lies substantially concentric about said axis, said leveralso having an axial bore entering the end having the concave recess, atubular pen holder seated in said concave recess and a bar extendinglaterally from said pen holder and adjustably received in said axialbore.

4. A pen holding attachment for a pantograph engraving machine having avertical chuck which moves horizontally above a work support, saidattachment comprising a shank removably supported in the chuck formovement therewith, an arm carried by and extending radially from saidshank, a lever pivoted in the arm below the shank for movement in avertical arc, said lever extending toward the axis of the shank, the endof the lever adjacent the axis of the shank having a concave recesstherein which lies substantially concentric about said axis, said leveralso having an axial bore entering the end having the concave recess, atubular pen holder seated in said concave recess, a bar extendinglaterally from said pen holder and entering the axial bore and meanscarried by the lever adjustably to hold said bar in said bore.

5. The combination of claim 4, including a pen, said bar frictionallyengaging and retaining said pen in said pen holder.

6. A pen holding attachment comprising a base and means for attachingthe base to a support member, a lever pivoted intermediate its ends tosaid base, one end of said lever being provided with a concave recess, atubular pen holder seated in said concave recess, a radially extendingbar on saidpen holder, said lever having an axial bore communicatingwith said recess, and receiving said bar and combined means carried bysaid base for limiting the pivotal REFERENCES CITED movement of saidlever and for oscillating said The following references are of record inthe Y Ih combination of claim 6 including me of this patent:

e spring means yieldingly urging said last means 5 UNITED STATES PATENTSto a limiting position. Number Name Date 8. The combination of claim 6,wherein said 474,773 Eickershofi et a1. May 10, 1892 base is bifurcated,said lever being pivoted to 1,299,006 Muller Apr. 1, 1919 said basewithin said bifurcation, said last means 10 2,337,341 Miller et al. Dec.21, 1943 including a plunger bore in said base communi- 2,451,931Edelmann Oct. 19, 1948 eating with said bifurcation, a plunger slidablyextending through said plunger bore and en- FOREIGN PATENTS gaging saidlever opposite its pivot from said Number o y a e recessed end, and aspring yieldingly urging said 15 21,752 Great Britain 1908 plunger fromsaid bifurcation. 556,898 Great Britain Oct. 27, 1943 AUGUSTINE J. MASI.573,472 Germany Apr. 1, 1933

